Talking-machine



.1. J. WOOD. TALKING MACHINE. APPLlCATlON FlL-ED DE CJQ, 1917.

Patented Mai 20, 1919. I

2 SHEETS-SHEET I.

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inventor. Jacmes J.Wood., 5 MQ His aTtto'Pne J. J. WOOD.

TALKIN'G MACHINE.

APPLICATION FILED Dims; 1911.

Patented May'20'; 1919;

Fig.2.

lnv-er'wtor-z James .lwood,

His fitter-neg.

AVAILABLE COPY .rAnns :r..woo1 ,-or roar WAYNE, INDIANA, ASSIGNOB ToGENERAL ELECTRIC COMPANY, A. CORPORATION OF NEW YOIB/K.

TALKING-MACHINE.

Specification of Letters Intent. I Original application filed Kay 8,1915, Serial No. 26,278. Divided and 1:11!

" edi a 20, 1919.

1917. Serial No. 207,853.

To all whom it may concern:

Be it known that I, JAMES J. citizen of the United States, residing atFort lVayne, county of Allen, State of Indiana, have invented certainnew and use- Woon, a

ful Improvements in Talking-Machines, of

whichthe following is a specification.

My invention relates to talking machines or similar apparatus and isparticularly apphcable to talking machines of the disk type. It has forits object to provide a novel form of drive for such machines. Myinvention comprises a novel and simple apparatus, in which, first, themotor is directly connected to the record carrying plate and drives theplate with constant angular velocity and, second, the speed of the motoris easily controlled.

My present application is a division of my prior application, Ser. No.26,278, filed May 6, 1915. i

The various features of novelty, which characterize my invention, arepointed out in the claims annexed to and forming part of thisspecification. For a better understanding of my invention reference maybe had to the following description, taken in connection with theaccompanying drawings, in which Figure 1 is a sectional view of atalking machine embodying my invention; Fig. 2 is a plan view of mymotor drive; Fig. 3 is a sectional view taken on the line 33 of Fig. 2;and Fig. 4 is an enlarged view of the speed controlling mechanism.

In Fig. 1 of the drawings, I have shown my invention applied to atalking machine of the disk type having a cabinet 1, a horn 2, and asound box arm 3 on which ismounted a sound box 41. The sound box carriesa stylus A motor plate 6 is mounted in the cabinet. These parts may beof any usual or well-known construction. 9

Supported from the motor plate 6 is a motor 7 having a vertical shaft 8.The motor 7 is preferably an electric motor. A record carrying plate 9is mounted on the shaft of the motor and carries a record 10, thegrooves on which are engaged by the stylus 5. The speed andangular'velocity of the motor are maintained constant by means of acentrifugal governor of novel design and mounting which comprises twocooperating members, one of which is preferably mounted on a universaljoint for reasons which will be" hereinafter set forth. One of thesemembers is a track 11 which is shown as being formed on the under sideof the motor plate. The other member comprises felt friction pads 12,weights 13 for moving the pads into more or less close engagement withthe track 11, and a member 14 to which the weights are pivoted and whichis shown as being mounted on a universal joint 15 on themotor shaft. Bythus mounting one member of the governor on a universa joint, thepressure of the friction pads on the track may be maintained constant,even though the shaft of the motor is tilted so as to be at anangle to the vertical, the pressure also being maintained constant eventhough there are slight irregularities in the track. The speed of themotor is varied by means of a novel mechanism which operates to raise orlower the shaft of the motor and thus change the pressure of thefriction pads 12 on the track 11. The current to the motor is turned onand oif by'means of a switch 16 of ordinary construction which may beoperated into the on and off positions manually. and when in the onposition, it may also be operated into the off position by means of arecord'stop 17, or after a definite number of revolutions of the motorby means of a novel mechanism shown and described in the parentapplication.

The friction pads 12 are pivoted to the governor weights 13, which areretarded by springs 18 connected to an equalizing member 19, shown inthe form of a ring. The springs and equalizing member together with theuniversal joint support for the weights, give an absolutely uniformpressure on the friction pads, thereby producing constant angularvelocity under all conditions of operation. The universal joint in thearrangement shown comprises gimbals mounted at rightangles to eachother.

The electric motor 7 is suspended from the motor plate 6 by means of abracket 20 fastened thereto by screws 21. The motor is shown as acommutator motor of the series type, which can be operated on thecommercial ranges of voltage of alternating current circuits and by theinsertion of a resistance 22 in series with the motor can be operated onthe same ranges of voltage of 'direct current circuits, the speed atdifferent commercial frequencies and voltages beioatidii filed December18,

. speed:

ings pound screw ing practically constant. In order to reduce vibrationto' a minimum and keep the bearof the motor in the bracket 20 properlylubricated for a considerable period of time, they are fitted with feltrubbers 23 set 120 degrees apart. These rubbers 23 take up automaticallyany looseness that maybe in the bearings tending to produce noise due toexcessive vibration. oil basin 24 is provided at the bottom of thebracket 20 to catch any drip that may occur; r v

The shaft 8 of the motor is raised or lowered to vary the speed of themotor by means'of a lever 25 which is operatively connected to the endof the motor shaft. This lever is rocked on its pivot by a compoundscrew which'engages one end of the lever 25 and which when turned in onedirection, lowers the bearing and increases the speed, and when turnedin the opposite directioirrais'es the bearing to decrease the The lever:25 is pivoted to. the bracket 20. Between the end 26 of the lever andthe shaft 8 is a ball 27 which acts as a ball thrust bearing therefonThe comis constructed of three concentric parts one within the other. afine threaded screw 28 for causing a small motion in. the direction ofits axis when a knob 29, formed integrally therewith is turned to theright or left. The second is acoarse threaded screw 30 which has aforked end 31 into which the lever '25 is fitted and which prevents thescrew 30 from turning. This screw 30 travels rapidly for a slight motionof the knob 29 and presses on the end of the lever 25 to rock it on itspivot through the agency of the third screw, which is-another finethreaded screw 32 of small diameter threaded into the coarse speedsindicated on threaded screw and fitting loosely within the knob 29. Thisfine threaded screw 32 is used to adjust the position of the lever 25with reference to the knob '29 so as to give the lever its initialadjustment. The motor plate 6 is provided with adial 33 on which aremarked certain speeds such as 76, 78 and 80 revolutions per minute. Bymoving the fine threaded screw, the lever 25 may be adjusted so as togive the exact speed marked on the dial 33 and to which a pointer 34:,car- 'ied by the knob 29,- poiuts. After the initial adjustment has beenmade, the turning of the pointer 3i to any of the other the dial willgive the speed of-the motor in accordance 'with that indicated on thedial.

I desire it to be understood that my invention is applicable to anytalking machine or simila apparatus and is not. limited to A little Thefirst isends of each of said springs,

the particular arrangement shown and described and I aim in the appendedclaims to cover all modifications which do not depart from the spiritand scope of my invention.

lVhatI claim as new and desire to secure by Letters Patent of the UnitedStates is 1. In a talking machine a motor plate, a motor supported fromsaid plate and having a vertical shaft, a record carrying plate mountedon said shaft and a centrifugal governor for said motor comprising atrack, friction pads for engaging said track, weights for moving saidpads into more or less close engagement with said track, and means formounting said weights on said shaft comprising a member to which saidweights are pivoted and a universal joint between said member and saidshaft.

2. In a talking machine,-a motor plate, a motor supported from saidplate and having a vertical shaft, a record carrying plate mounted onsaid shaft, and a c ntrifugal governor for said motor comprising atrack, friction pads for engaging said track, weights for moving saidpads into more or less close engagement with said track,

means for mounting said weights on said shaft comprising a member towhich said weights are pivoted and a universal joint between said memberand said shaft, springs, and equalizing means engaging the the other endof each of said springs engaging each of said weights.

3. In a talking machine. a motor plate, a motor mounted on said platehaving a vertical shaft, a record carrying plate mounted on said shaft,and a centrifugal governor for said motor comprising a track, frictionpads for engaging said track, weights to which said friction pads arepivoted. a member to which said weight-s are pivoted, and a universaljoint between said member and said shaft.

st. In a talking machine, a motor plate,

. a motor mounted on said plate having a vertical shaft, a recordcarrying plate mounted on said shaft,-,and a centrifugal governor forsaid motor comprising a track, friction JAMES J. woon;

and

